stevens



(No Model.) 2 Sheets-Sheet 1.

J. S. STEVENS, o. S. MAJOE s2-D. P. EDWARDS.

' LIFT AND HOIST.

No. 282,236; Patented Julv s1. 1883.

Nv Firms. Pham-mhngmphn wnwngum n. c.

(No Model.)V 2 Sheets--Shet 2. J. S. STEVENS, UJG. MAJOR 8v D.P.-EDWARDS.`

LII'T AND HOIST.

Pateyduly s1. 188s.u

UNITED A j STATES PATENT OFFICE.

JOHN ssrEvENs, AoIIAEL-Es G. MAJOR., AND DAVID P. EDWARDS, OF LON- DON,ENGLAND.

.LIFTAND HOIST.

SPECIFICATION forming part of Letters Patent N o. 282,256, dated July31, 1883.

Application led March 12, 1883. (No model.) Patented iu EnglandSeptember (i, 1882, No. 4,240.

To all whom it may concern: j

Beit known that we, JOHN SANDERS STE- vENs, CHARLES GEORGE MAJOR, andDAvID f I ing, and winding machinery,` and we do here-y by declare thefollowing to be a full, clear, and

exact description of the invention, suc-h as will enable others skilledin the art toI which it appertains to make and use the same. Ourinvention relates to improvements in lifting and winding machinery, bymeans of which the load or balance-weight is self-sus-- tained in anyposition when the motive power in either direction ceases. Power by handor other means is used in lifting or lowering the load.

y In this description the same letters of reference apply to the same orequivalent parts in all the figures. Infigure l, motive power is appliedin any i convenient lmanner to the shaft or spindle A, Figs. l, 2, 3,running freely in two bearings, B and C. One bearing, C, is continuedalong the shaft as a sleeve or tube, D, terminating in a fixed collar,E, of larger diameter than the sleeve, and occupying a portion of itslength. A loose collar, H, also runs freely upon the sleeve D. On thefaces of barrel F and loosel collar H nearest each other teeth orinden-V 35 tations are provided. Placed between the `barrel and loosecollar H, and engaging with the opposite sets of teeth, are two or morecams, I, pivoted at their centers on pins projecting from aploosecollar, J, also free upon the 44o sleeve D. The cams I are so formedthat when their shortest center lines or axes lie parallel with that ofthe sleeve D, they allowV the collar H and barrel F to mutually approachand to run freely, but if their shortest axes be 45 inclined to that ofthe sleeve in either direction they willthrustthe barrel Ftightly up tothe bearing G, and Vthe loose collar H tightly upto the fixed collar E,these movements increasing directly with and relatively to the 5oinclination of the toothed cams to thesleeve D. Fastened to the shaft Aand` revolving with it is a boss, with an arm, K, projecting over theloose collar H and extending to the end of the barrel F. This armengages with a projection on the barrelF and withanother similarprojection on collar H in such a manner that when it is in contact withboth the barrel and loose collar H, by means of their teeth, bring thecams I'to their centerv or parallel position. A second pair ofprojections 6o are provided on the barrel and collar H, so that if thearm K is moved in the reverse direction it will produce the same result.Now,

if the shaft A is caused to revolve-say by power applied through thedriving-wheel L; 6 5 the arm K, being secured to the shaft, will causethe parts F H I I to assume the abovedescribed positions, in which thebarrel and loose collar H are free on the sleeve D, and the arm K,acting as a driver, will cause allthe 7o loose parts torevolve, andaropewound upon the barrel would raise or haul a load, irrespective ofthe direction of rotation of the shaft. If the power applied through thewheel L be withdrawn, the load will cause the barrel F to move backward,and it will carry with it the arm K and shaft A, but will leave theloosecollar H stationary, the effect being that the longer axis of thecams thrusts asunder V the barrel F and loose collar H and causes 8othem to bind against the bearing C and fixed collar E, the resultingfriction preventing any further movement. Upon power being again appliedthe arm K drives forward the barrel until the cams I I are againparallel7 and at 85 this point meets the projection on the loose collarH, carrying all with it, as before. ,If it be desired to lower the load,the direction of the power is reversed. The arm K then leaves the barreland revolves until it strikes proj ec- 9o tion on loose collar H,forcing it in the direction the load is pulling the barrel. The latterbe ing at rest, the lcollar H causes the cams I to approach parallelism,and, freeing the barrel, allows it to follow the eifort of the load, themovement continuing so long as the arm K and loose collar H follow upthe barrel. When the shaft A ceases to revolve, and with it the j arm Kand collar H, the barrel, moving slightly forward under the influenceofthe load, again IOO binds itself by means of the toothed cams I I, andas these cams are formed to exert a thrust when their parallelism isdisturbed in either direction, the barrel will be held fast irrespectiveof the direction in which the load is pulling against it. The apparatusis therefore double or reverse acting.

In our second arrangement, Figs. 4, 5, 6, the bell K maybe secured tothe barrel F by a ring, M, as against axial movement, but left free asto revolution. Then the thrust of the toothed cams I I will cause thefixed collar E to be grasped tightly between the loose collar f H andthe bell K, producing the saine results as before.

In our third arrangement we produce the same results as in our rst andsecond by replacing thetoothed cams by a loose collar, N, Figs. 7 and 8,free upon the sleeve. In the inner face of collar H are cut two or moresemicircular recesses. Exactly opposite these a corresponding series offlat segmental recesses are cut in the faceof the collar N. Fitting intothe cavities formed by the juxtaposition of the two series of Yrecessesare cams I I, provided with arms engaging with the flange of barrel F.The recesses in H form sockets in which the cams I swivel. Inclinationin the arm of cam I produces thrust between collars H and N, withresults as before.

In our fourth arrangement, Figs. 9, 10, the sleeve D, fixed to thebearing C, is made without a collar at the other end. The barrel F runsfreely on the sleeve and the arm K is keyed to the shaft A, as before.On the end of the barrel is provided a projecting ring, O, on the innercircumference of which are formed teeth, as in an internal -toothedwheel. On the sleeve D and within the ring is a loose collar, H, splitin halves. On the outside of these halves are teeth corresponding tothose in the ring on the barrel. Between the two opposing sets of teethare disposed radially two or moretoothed cams, I I, as described forfirst arrangement. If the toothed cams are held in the radial or meanposition, all the parts are free to revolve. If any relative movement ofrevolution occurs between the barrel F and the split collar H in eitherdirection, the toothed cams will force the split collar H tightly uponthe sleeve D and all the parts will be held. Projections are provided,as before, on the barrel F and the split collar H, to engage with thearm K, and if power is applied to the latter it forces all the partsinto the mean position and .enables them to revolve freely, as

hereinbefore described.

In our fifth arrangement, Fig. 11, we omit the teeth from parts O I H,making the ring O with internal helical surfaces, I I, as plaincylindrical rollers, and H either with cylindrical or helical surfaces.Relative motion between -barrelF and ring O with split collar H willcause the rollers I I to wedge themselves into an ever-decreasing space,and thus thrust the split collar H upon the sleeve D. The arm K, asbefore, returns all to the mean position.

In our sixth arrangement, which is specially suited to Winches andcranes, Figs. 12, 13, 14, shaft A runs freely in side frame, C; a fixedclutch, E, is secured to frame C, a pinion, F, is provided withbevel-teeth or inclined surfaces on its side and runs freely upon shaftA; a loose collar, H, is provided with surfaces or teeth correspondingto pinion F, and fits the clutch E 5 a loose collar, J, carries cams I,with or without teeth, and to suit'the correspondf ing faces of pinion Fand collar H. A is the hand-shaft, and has secured to it a boss, K,which has projections engaging with similar projections on collar H. Theshaft has forged upon it an arm, S, which also engages with projectionson pinion F. The latter is connected by gearing to the drum-shaft.Motion given to the shaft A brings everything into the mean position byboss K and arm S, and by same means communicates motion to pinion, andtherefore to drum. Motion imparted by the load to the pinion F leavescollar H behind,.brings cams I I into action, and couples up, as before,between clutch E and frame C.

Having now described our invention and the best method of carrying outthe same, we would have it understood that we 'do not coniine ourselvesto the precise details shown and described, as they can be modified inmany ways without affecting our invention.

We claim- The combination of parts, as described, or their equivalent,with lifting, hauling, and winding machinery in which there is a drivingwheel or pulley to receive the power, a driven drum or its equivalent totransmit the power to the load, by Y'means of which combination thewhole apparatus is at all times free to receive motion through thedriving wheel or pulley in either direction, but is automaticallycoupled up to a fixed bearing, or the frame of the machine or itsequivalent, immediately motion in either direction commences at thebarrel orload-sustaining end ofthe apparatus.

In testimony whereof we affix our signatures in the presence ofwitnesses.

JOHN SANDERS STEVENS. CHARLES GEORGE MAJOR. lDAVID PUGH EDWARDS.

Vitnesses:

FRANCIS MURRAY RoGrERs, ARTHUR ROBERT CARTER. Witnesses to signature ofDavid Pugh Edwards:

THos. WV. STEPHENS,

Notary Public, (Yard/ij. J AMEs A. ORR,

39 Lower Cathedral Road, Camif.

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